Shoe sewing machine



Aug. 15, 1944. o. n. HAAS SHOE SEWING MACHINE Original Filed Sept. 14, 1939' 5 Sheets-Sheet 1 Aug. 15, 1944. o.'R. HAAS 2,355,724

SHOE SEWING- MACHINE Ori Filed t; 14,1959 5 Sheets-Sheet 2 Aug. 15, 1944. s 2,355,724

SHOE SEWING MACHINE Original File d Sept. 14, 1939 5 Sheets-Sheet 3 Maw @WW Aug 15, 1944. QRLHAAS 2,355,724

sncm SEWING MACHINE Original Filed Sept. 14, 1959 5 Shets-She et 4 v I 330 5% w Aug.'15, 1944. o. R; HAAS I 2,355,724

SHOE swmmcumg Qfiginal Filed Sept. 14, 1939 s Sheets-Sheet 5 356 warm 44M Patented Aug. 15, 1944 snot: SEWING MACHINE Otto R: Haas, North BeVerIy, Mass, assignor to 'United Shoe Machinery Corporation, -Flem--- ington, N. J., a corporation of New Jersey "Original application September 14, 1939, Serial- No. 294,926. Divided and this application October 23, 1941, Serial No. 416,229 v j 11 Claims. (Cl.11248) The present invention relates to shoe sewin machines and has for its'objects to improve'the construction, arrangement and mode of operation of certain parts'of such machines and more particularly the work "feeding and groove or channel cutting mechanisms of outsole lockstitch shoe sewing machines. V r I With the above objects in view, the several features of the present invention consist in the constructions,' arrangements and combinations of parts of the novel and improved work feeding and groove cutting mechanisms hereinafter described and claimed, the advantages of which will be readily understood'by those skilled in the art from the following description taken in connection with the accompanying drawings.

In the drawings, Fig. 1 is a'front view on an enlarged scale of the sewing head of a machine embodying the several features of the present invention, the casing being removed and portions of the frame broken away; Fig. 2 is a plan view on a similar scale. with the casing shown in section; Fig. 3 is a sectional view of the sewing head with the right end plate removed; Fig. 4 is a detail view on an enlarged scale of the needle and awl supporting stud and presserfoot with work grooving knife; Fig. 5' is a side view of the same partsfFig. 61s a. sectional view of the same parts, as viewed along the line 6-6 of Fig. 5; Fig. '7 is a plan view of the parts illustrated in Fig. 4.; Fig. 8 is a partial sectional view taken on the line 88 of Fig. 7;" Fig. 9 is a sectional view of the sewing head taken along the line 9-.-9 of Fig. 1; and-Fig.- 10jis adetail view in front elevation of a portion of the'work feeding mechanism.

The illustrated machine'is a lockstitch outsole shoe s'ewingmachine of the same general construction and mode "of operation as that ,disclosed in U. S, Letters'Patent to French and Meyer No.473,870, of Apri1'26, 1892; The machine is fully illustrated and described in appli- I cants' pending application Serial No. 294,926, filed September 14,;1939 for Shoe'sewing machines and driving and-stopping mechanisms therefor,iof which application the present application is adivision.

- In the-machine ofPatent-No. 473,8'70Qa rela tively long feed slide 'having avertical supporting. arm carrying the awl and-feed slide actuating mechanism adjustable for varying the len th of feeding movement are provided, mounted directly on the feed slide. 1 Not only is the feed slide subject to unusual'strain in the patented machine, due to the .distance between the slide portion and the mounting of the'awl on *the vertical arm, but the adjusting connections are so arranged that-they partake of the vibratory feeding movements .of the slide due to their mounting on the slide. ".Accurate adjustments in the length of feeding movement, therefore,

are rendered. inconvenient during sewing dueto the vibration of the slide. r l

In the present machine-the awl is mounted on the same studasthe needle; and is actuated through its feeding ;movements by the vertical feed lever fulcrumed on the frame of the machine beneath the stud and arranged I cause the'awl to move along the-stud in the line of feed, sepa? 'rate adjustable mechanism. driven from thesew ingshaft beingprovided. Referring to Figsfll to 8 inclusive and 10, the needle and awl stud'isindi .cated'at 330'iand: is-secured at its left end in "a forwardly extending arm 'of the machine frame-on which is also mounted the work support 2261 The stud 330 is formed with an enlarged portion on which the needle segment 332 is rotatably mounted and a collar 334'for holding the needle segment in contact with the arm of the machine frame to prevent movement'lengthwise of the'segment on the stud. Surrounding the hub of the needle segment is a needle guide 336 actuated in the usual way. The reduced" right' end of the needle stud extends through" the uppe'r end of a supporting plate 331 bolted to'a'bracket -338"secured to the machine frame in'place of the usual feed slide. The awl segmentis indicated at 340 slidingly and rotatably mounted onthe reduced end of the stud 339 and formed with'a groove surrounding its hub within which is received the forked upper end of a feed lever. 342 fulcrun'iedon a pin 344 secured in the bracket 338; The lower end of the feed lever is ball-shaped and is surrounded by'a'socket in a link connection 346 comprising'one ofj afpair of inter-connected links forming the adjustable feed actuating mechanism,'most clearly illustrated in Figs. 1, 2, and 3 audit). The adjustable feed actuating mechanism'also'includes a link 348 universally connected at one end to the end of the link'346 remote from the feed lever 342 an d pivoted by a stud 3W9 at its other end to one arm of a feed camlever 350 fulcrumed on a fined vertical shaft 35!. The feed cam lever carries a cam parallel arms of the cam lever 350 act as guides for the stud 354 which is otherwise unsupported. Oscillation of the feed cam lever 356 reciprocates the link 348 which in turn reciprocates the link 346 to impart oscillating movements to the feed lever 342; When the stud 354 is moved between the arms of lever 350 towards and from the fulcrum shaft 3.51 of the lever, the length of feeding movement imparted by the lever 350 through the links 346, 348 to the feed lever 342 is increased or decreased. To hold the links in position between the guide surfaces of the lever 350, the stud 354 is connected through a link 356 to one arm of an adjusting lever 358 mounted onapivot 366 secured in the machine frame. The other arm of the adjusting lever is formed with a handle portion exposed at the front of the cover plate 92 and rides over a fixed segmental plate 362 arranged to receive stop pins or other motion limiting means of conventional form. The arrangement of the feed adjusting connections is such that simple and rigidly joined parts are employed, the forces of action and reaction being directly applied without causing binding or other frictional disadvantages, as in the machine of Patent No.473,870. The ad- .iusting'handle of the lever 358 also remains stationary so that a more accurate control is possible.

To cut a stitch receiving groove in the work, the forwardly extending arm of the presser foot lever 229 is formed with a guideway to receive a slide 364 and the presser foot 228 has a slot at its 'work engaging end within which slides a flat work cutting knife 366. 'The upper end of the cutting knife 1366 is perforated and slotted to receive a lug extending transversely of the direction of feed from the slide 364 and a shouldered guide screw i368 threaded into the presser foot 228 so that the knife is connected for movement with the slide in the direction of feed on the presser foot. To actuate the slide 364 in the direction of feed, the slide has a downwardly extending arm engaging one end of a reciprocating pin 31.0 slidably mountedfn the plate 33! close to and at the rear of the needle and awl stud 330. The other end of the pin 310 engages an end surface of the awl segment 340 so that movement of the awl segment, while the awl is being back fed, imparts a cutting stroke to the knife 366. To insure that the knife actuating slide 364 follows closely with the feeding movements of the awl segment, a spring 312 is connected at one-end to the slide 364 and at the other end to a screw 314 passing diametrically across an opening 376 in the presser foot lever 229. Suitable adjustments are provided for regulating the location of the groove cut'by the knife .366transversely of the directionof feed includin a block 318 adjustably mounted for movements on the presser foot lever 229 transverse to the slide 364, to which block the presser foot 226 is secured. With this arrangement, the location of the groove cut by the knife is-regu- .lated by transverse adjustment of the presser foot on the presser foot lever.

To guide the inner edge of the work, an edge gage 319 is mounted on a short slide 380 and may be optionally connected to be adjusted forwardly and rearwardly of the machine by movement of the feed adjusting lever 358 in a manner similar to that in the machine of the Patent No. 473,870.

.The nature and scope of the invention having been indicated and a particular embodiment of the invention having been described, what is claimed is:

1. A shoe sewing machine having, in combination, a main frame, a sewing shaft in the frame,

stitch forming devices including a curved hook needle, a needle segment, a curved awl, an awl segment, a stud secured at its ends in the machine frame on which the needle and awl segments are mounted, means for oscillating the awl segment, and means for shifting the awl segment along the stud relatively to the needle segment while the stud remains stationary comprising a feed lever fulcrumed on the frame of the machine, and adjustable connections driven from the sewing shaft for actuating the feed lever to reciprocate the awl segment in the direction of feed and manually actuable for changing the feeding movement imparted to the awl segment during sewing.

2. A shoe sewing machine having, in combination, a mainframe, a sewing shaft in the frame, stitch forming devices including a curved hook needle, a needle segment, a curved awl, an awl segment having a grooved hub, a stud secured at its ends in the machine frame on which the needle and awl segments are mounted, means for oscillating the awl segment, and means for shifting the awl segment along the studrelatively to the needle segment comprising a feed lever fulcrumed on the frame of the machine and formed at one end to engage the groove in the hub of the awl segment, and adjustable connections driven from the sewing shaft for actuating the feed lever to reciprocate the awl segment in the direction of feed and for changing the feeding movement imparted to the awl segment during sewing.

3. A shoe sewing machine having, in .combina-- tion, a main frame, a sewing shaft in the frame, stitch forming devices including a curved hook needle, a needle segment, a curved awl, an awl segment having a grooved hub, a stud secured at its ends inthe machine frame on which the needle .and awl segments are mounted, means for oscillating the awl segment, and means for shifting the awl segment along the stud relatively to the needle segment comprising a vertically arranged feed lever fulcrumed on the ma n frame beneath the .stud and engaging the groove in the hub of the awl segment, a cam lever actuated by the sewing shaft, adjustable connections between the feed and cam .levers,land means for adjusting the relations of the connections during sewing to change the length of feeding movement imparted to the awl and cam lever.

4. Ashoe sewing machine having, in combination, a main frame, a sewing shaft in the frame, stitch forming devices including a curved hook needle, .a needle segment, a curved awl, an awl segment having a grooved hub, a stud on which the needle and awl segments are mounted, means ibr oscillating the awl segment, and. means for shifting the awl segment along the stud relatively to the needle segment comprising a vertically arranged feed lever fulcrumed on the main frame beneath the stud and engaging the groove in the hub of theawl segment, a cam lever actuated by the sewing shaft, a pair of inter-connected links between the feed and cam levers for actuating the feed lever, and means for changing the position of the point of connection between the links during sewing to increase or decrease the length of feeding movement imparted to the a-wl segment and cam lever.

5. A shoe sewing machine having, in combination, a main frame, a sewing shaft in the frame, stitch forming devices including a curved hook needle, a needle segment, a curved awl, an awl segment having a grooved hub, a stud on which the needle and awl segments are mounted, means for oscillating the awl segment, and means for shifting the awl segment along the stud relatively to the needle segment comprising a vertically arranged feed lever fulcrumed on the main frame beneath the stud and engaging the groove in the hub of the awl segment, a cam lever actuated by the sewing shaft, a pair of interconnected links between the feed and cam levers for actuating the feed lever, means for changing the position of the point of connection between the links during sewing to increase or decrease the length of feeding movement imparted to the awl segment and cam lever, and a guide carried by the cam lever to support the connecting links at the point of connection therebetween. a

6. A shoe sewing machine having, in combination, stitch forming devices, and mechanism for actuating one of said devices to feed the work having a cam lever provided with an angularly disposed arm and spaced guides, connections between the angularly disposed arm of the cam lever and said stitch forming devices including a pair of interconnected links, means for changing the point of connection between the links and for holding said links between the spaced guides on the cam lever.

'7. A shoe sewing machine having, in combination, stitch forming devices including a curved needle and a curved awl, needle and awl segments, a stud about which said needle and awl segments oscillate, means for imparting a work feeding movement along said stud to one of said segments, and a knife actuated by an end surface on the feeding segment to cut a stitch receiving groove in the work during the back feeding movement of said segment.

8. A shoe sewing machine having, in combination, stitch forming devices including a curved needle and a curved awl, needle and awl segments, a stud about which said needle and awl segments oscillate, means for imparting a Work feeding movement along said stud to one of said segments, a groove cutting knife, connections engaging an end surface of the feeding segment to actuate the knife in the line of feed, and a spring for holding said connections in engagement with the end surface of said segment during the cutting stroke of the knife.

9. A shoe sewing machine having, in combination, stitch forming devices including a curved hook needle and a curved awl, needle and awl segments, a supporting stud for said segments, end bearing members for the stud, means for imparting a work feeding movement along said stud to one of said segments, a pin slidably supported in one of the stud bearing members and arranged at one end to engage an end surface of the feeding segment, a work grooving knife, and a carrier for said knife having a finger contacting the other end of the slidable pin to cause the knife to cut the work during the back feeding movement of said segment.

10. A shoe sewing machine having, in combination, stitch forming devices including a curved hook needle, a curved awl, a needle and awl supporting stud, end bearing members in which said stud is mounted, a needle segment secured from movement lengthwise of the stud adjacent one bearing member, an awl segment mounted in advance of the needle segment in the direction of work feed, means for imparting a work feeding movement along the stud to the awl segment, a, pin slidably supported in one of the stud bearing members, and arranged at one end to engage an end surface of the'awl segment, a work grooving knife and a carrier for said knife having a portion contacting the other end of the slidable pin to cause the knife to cut the work during the back feed of the awl segment.

11. A shoe sewing machine having, in combination, stitch forming devices including a curved hook needle and a curved awl, a needle and awl supporting stud, a presser foot, a presser foot lever, a guideway on the presser foot lever, a carrier in the guideway, a groove cutting knife on the carrier, a slot in the presser foot, for receiving one end of the groove cutting knife, said presser foot being adjustable on the presser foot lever transversely of the direction of feed, and the knife being connected without substantial movement relatively to the carrier in the direction of the seam line to cause accurate ,cutting action of the knife and being slidable relatively to the carrier in a direction transversely of the seam line to cause the location of the groove to be regulated by adjustment of the presser foot.

OTIO R. HAAS. 

